<template>
  <div>
    <div class="shopcart">
      <div class="content">
        <div class="content-left" @click="toggleShow">
          <div class="logo-wrapper">
            <div class="logo" :class="{highlight: totalCount}">
              <i class="iconfont icon-shopping_cart" :class="{highlight: totalCount}"></i>
            </div>
            <div class="num" v-if="totalCount">{{totalCount}}</div>
          </div>
          <div class="price" :class="{highlight: totalCount}">￥{{totalPrice}}</div>
          <div class="desc">另需配送费￥{{info.deliveryPrice}}元</div>
        </div>
        <div class="content-right">
          <div class="pay" :class="payClass">
            {{payText}}
          </div>
        </div>
      </div>
      <transition name="move">
        <div class="shopcart-list" v-show="listShow">
          <div class="list-header">
            <h1 class="title">购物车</h1>
            <span class="empty" @click="clearCart">清空</span>
          </div>
          <div class="list-content">
            <ul>
              <li class="food" v-for="(food, index) in cartFoods" :key="index">
                <span class="name">{{food.name}}</span>
                <div class="price"><span>￥{{food.price}}</span></div>
                <div class="cartcontrol-wrapper">
                  <CartControl :food="food"/>
                </div>
              </li>
            </ul>
          </div>
        </div>
      </transition>
    </div>
    <div class="list-mask" v-show="listShow" @click="toggleShow"></div>
  </div>
</template>

<script>
  import CartControl from "../CartControl/CartControl"
  import {mapState, mapGetters} from "vuex"
  import BScroll from "better-scroll";

  export default {
    props: ["food"],
    name: "ShopCart",
    data() {
      return {
        isShow: false
      }
    },
    methods: {
      toggleShow() {
        this.isShow = !this.isShow;
        this.$nextTick(() => {  //dom元素更新后
          // 思考一下  //单例模式  提高性能  解决逻辑错误bug
          if (!this.scroll) {  //表示没有
            this.scroll = new BScroll('.list-content', {
              click: true
            })
          } else {  //已经new了  重新计算 better-scroll，当 DOM 结构发生变化的时候务必要调用确保滚动的效果正常。
            this.scroll.refresh()  //如果有重新直接读取当前的dom的高度
          }
        })
      },
      clearCart(){
        this.$messagebox.confirm("确定删除吗?").then(sure=>{
          this.$store.dispatch('clearCart')
        },cancel=>{

        })

      }
    },
    computed: {
      ...mapState(["cartFoods", "info"]),
      ...mapGetters(["totalCount", "totalPrice"]),
      payClass() {
        let {totalPrice} = this;
        let {minPrice} = this.info
        return totalPrice > minPrice ? "enough" : "not-enough"
      },
      payText() {
        let {totalPrice} = this;
        let {minPrice} = this.info
        if (totalPrice === 0) {
          return `￥${minPrice}元起送`
        } else if (totalPrice < minPrice) {
          return `还差￥${minPrice - totalPrice}元起送`
        } else {
          return `结算`
        }
      },
      listShow() {
        let {totalCount} = this
        if (totalCount == 0) {
          this.isShow = false
          return false
        }
        return this.isShow
      }
    },
    components: {
      CartControl
    }
  }
</script>

<style lang="stylus">
  @import "../../common/css/mixins.styl"
  .shopcart
    position fixed
    left 0
    bottom 0
    z-index 50
    width 100%
    height 48px

    .content
      display flex
      background #141d27
      font-size 0
      color rgba(255, 255, 255, 0.4)

      .content-left
        flex 1

        .logo-wrapper
          display inline-block
          vertical-align top
          position relative
          top -10px
          margin 0 12px
          padding 6px
          width 56px
          height 56px
          box-sizing border-box
          border-radius 50%
          background #141d27

          .logo
            width 100%
            height 100%
            border-radius 50%
            text-align center
            background #2b343c

            &.highlight
              background $green

            .icon-shopping_cart
              line-height 44px
              font-size 24px
              color #80858a

              &.highlight
                color #fff

          .num
            position absolute
            top 0
            right 0
            width 24px
            height 16px
            line-height 16px
            text-align center
            border-radius 16px
            font-size 9px
            font-weight 700
            color #ffffff
            background rgb(240, 20, 20)
            box-shadow 0 4px 8px 0 rgba(0, 0, 0, 0.4)

        .price
          display inline-block
          vertical-align top
          margin-top 5px
          line-height 24px
          padding-right 12px
          box-sizing border-box
          font-size 16px
          font-weight 700
          color #fff

          &.highlight
            color #fff

        .desc
          display inline-block
          vertical-align bottom
          margin-bottom 15px
          margin-left -45px
          font-size 10px

      .content-right
        flex 0 0 105px
        width 105px

        .pay
          height 48px
          line-height 48px
          text-align center
          font-size 12px
          font-weight 700
          color #fff

          &.not-enough
            background #2b333b

          &.enough
            background #00b43c
            color #fff

    .ball-container
      .ball
        position fixed
        left 32px
        bottom 22px
        z-index 200
        transition all 0.4s cubic-bezier(0.49, -0.29, 0.75, 0.41)

        .inner
          width 16px
          height 16px
          border-radius 50%
          background $green
          transition all 0.4s linear

    .shopcart-list
      position absolute
      left 0
      top 0
      z-index -1
      width 100%
      transform translateY(-100%)

      &.move-enter-active, &.move-leave-active
        transition transform .3s

      &.move-enter, &.move-leave-to
        transform translateY(0)

      .list-header
        height 40px
        line-height 40px
        padding 0 18px
        background #f3f5f7
        border-bottom 1px solid rgba(7, 17, 27, 0.1)

        .title
          float left
          font-size 14px
          color rgb(7, 17, 27)

        .empty
          float right
          font-size 12px
          color rgb(0, 160, 220)

      .list-content
        padding 0 18px
        max-height 217px
        overflow hidden
        background #fff

        .food
          position relative
          padding 12px 0
          box-sizing border-box
          bottom-border-1px(rgba(7, 17, 27, 0.1))

          .name
            line-height 24px
            font-size 14px
            color rgb(7, 17, 27)

          .price
            position absolute
            right 90px
            bottom 12px
            line-height 24px
            font-size 14px
            font-weight 700
            color rgb(240, 20, 20)

          .cartcontrol-wrapper
            position absolute
            right 0
            bottom 6px

  .list-mask
    position fixed
    top 0
    left 0
    width 100%
    height 100%
    z-index 40
    backdrop-filter blur(10px)
    opacity 1
    background rgba(7, 17, 27, 0.6)

    &.fade-enter-active, &.fade-leave-active
      transition all 0.5s

    &.fade-enter, &.fade-leave-to
      opacity 0
      background rgba(7, 17, 27, 0)
</style>
